Classification of Volatile Products from the Temperature-Programmed Pyrolysis of Low- and High-Density Polyethylene
Makaleler > Tam Makale · 1998
Yazarlar: Levent BALLİCE, MÜMİNE YÜKSEL, M SAGLAM, R REIMERT, H SCHULZ
Energy & Fuels, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 1998, cilt 12, ss 925-928
DOI: 10.1021/ef980004d
Özet
A fixed bed reactor under argon flow was used to pyrolyze small samples of low- (LDPE) and high-density (HDPE) polyethylene. A special gas-phase sampling technique was used to determine the composition of products eluted from the reactor as a function of temperature and time. Capillary gas chromatography was used to determine the total volatile product evolution rate. The maximum volatile product evolution temperature was 425 °C for LDPE and 430 °C for HDPE. The distribution of n -paraffins and 1-olefins was determined. The hydrocarbon fraction from LDPE contained 47.2 wt % n -paraffins at the maximum product evolution temperature; the weight percentages were 6.6 gaseous n -paraffins, 9.1 C 5 −C 9, 23.7 C 10 −C 15, and 60.6 C 16 . The yield and distribution of hydrocarbons from pyrolysis of HDPE at the maximum product evolution temperature of 430 °C were similar to that found for LDPE. n -Paraffins constituted 48.8 wt %, of which 5.5 wt % were gaseous n -paraffins, 9.4 wt % C 5 −C 9, 23.5 wt % C 10 −C 15, and 61.6 wt % C 16+ . 1-Olefin products were also grouped by carbon number. Pyrolysis of LDPE produced 14 wt % of 1-olefins at the maximum product evolution temperature; weight percentages were 20.7 1-olefins gases, 22.8 C 5 −C 9, 26.4 C 10 −C 15, and the 30.1 C 16+ . Pyrolysis of HDPE produced 14.4 wt % of 1-olefins, of which 33.3 wt % were 1-olefin gases, 40.9 wt % C 5 −C 9, 17.3 wt % C 10 −C 15, and 8.5 wt % C 16+ .